4amv

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{{STRUCTURE_4amv| PDB=4amv | SCENE= }}
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==E.COLI GLUCOSAMINE-6P SYNTHASE IN COMPLEX WITH FRUCTOSE-6P==
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===E.COLI GLUCOSAMINE-6P SYNTHASE IN COMPLEX WITH FRUCTOSE-6P===
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<StructureSection load='4amv' size='340' side='right' caption='[[4amv]], [[Resolution|resolution]] 2.05&Aring;' scene=''>
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{{ABSTRACT_PUBMED_16339762}}
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== Structural highlights ==
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<table><tr><td colspan='2'>[[4amv]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=2bpl 2bpl]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4AMV OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4AMV FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=F6R:FRUCTOSE+-6-PHOSPHATE'>F6R</scene></td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4amk|4amk]]</td></tr>
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<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Glutamine--fructose-6-phosphate_transaminase_(isomerizing) Glutamine--fructose-6-phosphate transaminase (isomerizing)], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.6.1.16 2.6.1.16] </span></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4amv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4amv OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4amv RCSB], [http://www.ebi.ac.uk/pdbsum/4amv PDBsum]</span></td></tr>
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</table>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Glucosamine-6P synthase catalyzes the synthesis of glucosamine-6P from fructose-6P and glutamine and uses a channel to transfer ammonia from its glutaminase to its synthase active site. X-ray structures of glucosamine-6P synthase have been determined at 2.05 Angstroms resolution in the presence of fructose-6P and at 2.35 Angstroms resolution in the presence of fructose-6P and 6-diazo-5-oxo-L-norleucine, a glutamine affinity analog that covalently modifies the N-terminal catalytic cysteine, therefore mimicking the gamma-glutamyl-thioester intermediate formed during hydrolysis of glutamine. The fixation of the glutamine analog activates the enzyme through several major structural changes: 1) the closure of a loop to shield the glutaminase site accompanied by significant domain hinging, 2) the activation of catalytic residues involved in glutamine hydrolysis, i.e. the alpha-amino group of Cys-1 and Asn-98 that is positioned to form the oxyanion hole, and 3) a 75 degrees rotation of the Trp-74 indole group that opens the ammonia channel.
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==Function==
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Glutamine binding opens the ammonia channel and activates glucosamine-6P synthase.,Mouilleron S, Badet-Denisot MA, Golinelli-Pimpaneau B J Biol Chem. 2006 Feb 17;281(7):4404-12. Epub 2005 Dec 9. PMID:16339762<ref>PMID:16339762</ref>
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[[http://www.uniprot.org/uniprot/GLMS_ECOLI GLMS_ECOLI]] Catalyzes the first step in hexosamine metabolism, converting fructose-6P into glucosamine-6P using glutamine as a nitrogen source.
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==About this Structure==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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[[4amv]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=2bpl 2bpl]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4AMV OCA].
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</div>
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== References ==
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==Reference==
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<references/>
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<ref group="xtra">PMID:016339762</ref><ref group="xtra">PMID:017322533</ref><ref group="xtra">PMID:018295797</ref><references group="xtra"/><references/>
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__TOC__
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</StructureSection>
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
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[[Category: Golinelli-Pimpaneau, B.]]
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[[Category: Golinelli-Pimpaneau, B]]
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[[Category: Mouilleron, S.]]
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[[Category: Mouilleron, S]]
[[Category: Ammonia channeling]]
[[Category: Ammonia channeling]]
[[Category: Glucosamine 6- phosphate synthase]]
[[Category: Glucosamine 6- phosphate synthase]]

Revision as of 09:17, 21 December 2014

E.COLI GLUCOSAMINE-6P SYNTHASE IN COMPLEX WITH FRUCTOSE-6P

4amv, resolution 2.05Å

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